Abstract: A production line for the manufacture of strips of vinyl siding comprises an extruder extruding a strip of hot plastic material, such as vinyl. Next, an embosser supplies a decorative pattern to the heated strip. A cooling apparatus receives the heated strip and immerses the strip in a water bath to lower the temperature to a selected temperature range. The material, now reduced in temperature, is then passed to a former having dies creating joining runs in the cooled, embossed siding strip. Finally the strip runs through a final cooling tank which chills the strip to harden the joining runs created by the former. The cooling apparatus consists of a water bath tank with entry and exit guides for the strip, which are mounted above the level of the water in the water bath tank.

Abstract: This invention relates to a method and apparatus for forming soft capsules and provides novel processing flexibility. The apparatus comprises a three-way valve injector wedge. This injector wedge allows for set-up of the encapsulation machine with a placebo fill and quick change over to active fill. This conserves use of the active ingredient.

Abstract: An extrusion process is described for the extrusion of a synthetic wood material. The process includes a significantly higher compression ratio through which the extruded product must pass. The higher compression ratio results in significantly improved product qualities.

Abstract: A manufacturing method of an electret processed product, comprising the steps of allowing a section nozzle (22) to come into contact with a nonconductive fiber sheet (S) so as to cross in the lateral direction of the sheet while running the sheet, allowing the surface of the sheet on the opposite side of the contact portion to come into contact with or to immerse into a water surface, sucking water from the suction nozzle (22) so that the water can be passed through the sheet in the thickness direction of the sheet to penetrate the water into the nonconductive fiber sheet (S), and drying the nonconductive fiber sheet (S), whereby a high quality and high performance electret processed product can be manufactured at a low cost.

Abstract: A novel apparatus for the preparation of a polymer solution includes a stirring device, an extruder connected to the stirring device, a cooling device connected to the extruder, and a warming device connected to the cooling device. The extruder is a fiber or membrane extruding die. Both the cooling device and warming device are vessels.

Abstract: This invention relates to a method and apparatus for forming soft capsules and provides novel processing flexibility. The apparatus includes extrusion dies as an alternative to spreader boxes and the use of melt-on-demand technology to enhance the long term stability of the film-forming materials. Preferred embodiments provide a positive displacement pump to transport the molten film-forming material from the melt-on-demand device to the extrusion device and preferably a reservoir means disposed between said extrusion device and said means to melt said film-forming material. The encapsulation apparatus may also include a valved injection wedge.

Abstract: An external stabilizer or guide cage for plastic film extrusion has an upper frame comprised of a ring and structure for rotatably supporting the ring. A lower frame is suspended from the ring of the upper frame, and is positioned such that the lower frame surrounds the extruded tube. The lower frame can employ one or several banks of guide arms that keep the tube aligned axially as the tube is drawn upwards. The arms on the lower frame define an iris aperture, or a stack of iris apertures. The arms include channels for coolant flow. Heat transfers from the film to the guide arm. The upper frame includes a drive for rotating the ring and the lower frame of the guide cage over a predetermined arc, e.g., 60 degrees, to compensate for gauge variations in the film.

Abstract: An adapter for an extruder for producing plastic profiles is provided for the purpose of being disposed between an extrusion cylinder and an extrusion die, with the basic body of the adapter comprising a flow channel which is delimited at one outer side by a wall surface of the basic body and at one inner side by a deflection body which is rigidly connected with the basic body. A careful homogenization of the melt can be achieved in such a way that the deflection body is provided with a substantially spherical arrangement and is exclusively held by a holding pin which is situated downstream and is connected via bridges with the adapter.

Abstract: A honeycomb structure molding apparatus 1 having a spinneret 4 provided with a back pore part 3 for introducing a molding material and a slit part 2 for extruding the molding material, and a press plate 5 for fixing the spinneret 4, in which the spinneret 4 comprises an inner side part 11 and an outer peripheral part 12, the inner side part 11 is protruded to the downstream side to form a level difference part 15 between the inner side part 11 and the outer peripheral part 15, the press plate 5 is opened opposing the inner side part 12 of the spinneret 4 and presses the downstream side of the outer peripheral part 12 of the spinneret 4 through a gap part 7, and there is provided a gap adjusting means 130 capable of changing width of the gap of the gap part 7.

Abstract: An extrusion molding system includes a movable die arranged at an output end of an extruder to be movable in an optional direction, a cooling water tank arranged to extend linearly from an outlet of the movable die, and a plurality of restrictors arranged in series in the cooling water tank to be moveable in an optional direction. Each restrictor has a passage formed therethrough to restricted the passing position and direction of a work by passing the work through the passage.

Abstract: An extruder includes a barrel having at least one axial bore extending to a downstream end of the barrel, a cutting plate of a granulating unit, received against a contact surface at the downstream end, and a plurality of heating elements in the barrel in the immediate vicinity of the contact surface. The heating elements are preferably heating cartridges which are received in two pairs of parallel bores at right angles to each other, thereby forming a square in a plane transverse to the axial bore.

Abstract: The present invention relates to a pellet-type non-crosslinked polypropylene foam having a melting point of 125 to 140□, and a process and device for producing said foam. Since the pellet-type foams of non-crosslinked polypropylene of the present invention has a lower melting point and a closed cell content of 80% or more, it is advantageous to mold such foams. The present invention also relates to an article molded from the above pellet-type non-crosslinked polypropylene foams.

Abstract: A system for producing cables includes an extrusion apparatus with one or a plurality of extruders and a head through which the line or lines for the cable pass and after which an induction heating apparatus is arranged, whereby downstream of the head and the induction heating apparatus is a suspended vulcanization tube that extends horizontally in the manner of a catenary curve and that constitutes a plurality of tube pieces of which the tube piece adjacent to the head is a telescoping tube enabling access to the head. It is the object to increase the efficiency of a cable production system using measures that make possible earlier and more rapid heating of the insulating layers applied in the head and simpler operation of the system and concurrently permit simpler and more rapid access to the molding die when cleaning the head and when a tool is being exchanged.

Abstract: A cooling die for extruding of high moisture extrudate food products having a cooling die body in which are defined a plurality of extrudate flow channels extending between an inlet end of the cooling die that is attachable to an extruder and outlet end for delivery of cooled-down extrudate, and coolant cavities located in heat-exchanging communication with the extrudate flow channels and connectable to a source of coolant, characterized in that the cooling die body consist of a plurality of thick plates having first and second channels extending between and opening at the planar surfaces of the thick plates, and that the plurality of thick places are stacked and fastened together such that the opening of the first and second channels of adjoining plates are respectively aligned with one another, whereby the first channels form said plurality of extrudate flow channels and the second channels form a plurality of discrete coolant channels extending through the length of the cooling die body.

Abstract: An extruder, and a method of using the same, that provides instantaneous inspection of the extrudate. The invention incorporates the use of video monitors electrically connected to video cameras, to provide magnification observation of the extrudate, and may use associated mirrors to observe the extrudate along multiple views as it exits the die.

Abstract: A sizer assembly for providing a shaped polymeric article in an extrusion process comprises a sizer body having a product profile channel corresponding to the shaped polymeric article formed therethrough. The sizer body comprises a plurality of cooling liquid inlet slots forming an opening substantially around the product profile channel and a plurality of vacuum slots forming an opening substantially around the product profile channel for removing cooling liquid expelled from said cooling liquid inlet slots.

Abstract: Open celled membranes from thermoplastic polymers are prepared from foamed polymer melts by extrusion through a die.

Abstract: A method and an apparatus capable of extrusion molding a comparatively wide, thin ceramic sheet using a screw extruder while suppressing the wrinkling thereof. The molding apparatus includes a screw-type extruder and a mold at the forward end of the extruder is used to extrusion mold a ceramic sheet from the ceramic material introduced into the extruder by way of the mold. The extrusion molding is carried out while regulating the temperature of the portion of the ceramic material passing through the mold corresponding to each of a plurality of areas (control zones) into which the mold is divided.

Abstract: A method and an apparatus for making a plastic film, and to a plastic film wherein the method includes extruding a film from plastic material by an extruder and orientating the film after extrusion. Material is mixed into the plastic so that when the plastic film is stretched, cavitation bubbles are formed in the material particles mixed into the plastic. After orientation, gas is arranged to act on the plastic film under high pressure so that the gas diffuses in the cavitation bubbles and causes overpressure in them. Thus it is possible to make a thin foamed film with a foaming degree of over 70%.

Abstract: There is provided a pipe extrusion die that includes a first and second die assembly. The first and second die assembly each include an extrusion head, a nozzle carrying an outer die lip, a hollow mandrel, an inner mandrel carrying an inner die lip, and a layer-forming channel. The layer-forming channel is defined by the space between the nozzle and inner mandrel. The extrusion die includes a space between the nozzle of the second die assembly and the inner mandrel of the first die assembly such that the first and second die assembly do not share a common wall. The space between the inner and outer die lip (die gap) can be individually adjusted and the second die assembly is freely movable relative to the first die assembly. The extrusion die also includes a vacuum cooling mandrel with a single cooling channel and multiple vacuum ports that provide improved vacuum control over the final die product.

Abstract: An apparatus for producing a tube having a round cross-section over a major portion of its length and intermediate its ends having a flattened oval cross-section. The apparatus includes an extrusion head with an extrusion die through which the tube is extruded. A pinching device, which includes opposed pinching elements, is arranged at the extrusion head so as to be selectively moveable together to press on and pinch the tube to produce the oval cross-section of the tube. The rollers are selectively moveable apart to not pinch the tube to enable the tube to be extruded round, whereby a round tube with an intermediate flattened oval shaped portion is produced.

Abstract: An apparatus for cooling and calibrating and extruded plastic profile (2) is described, with a cooling tank (4) which receives a cooling liquid (12) and can be charged with a pressure below atmospheric, and with at least one calibrating device (5) arranged within the cooling tank (4) for the plastic profile (2) pulled through the cooling tank (4), with the calibrating device (5) being composed of individual parts extending in the direction of passage of the plastic profile (2). In order in to provide advantageous construction conditions it is proposed that the parts of the calibrating device (5) form calibrating elements (8) which are distributed over the circumference of the plastic profile (2) by leaving out gaps (15) for the passage of cooling liquid.

Abstract: A method for manufacturing an extrusion molding with a smooth surface. An apparatus having a die and a sizing equipment is supplied with a molding material of thermoplastic resin. A heat conducting member is disposed within a flow channel of the die, and its tapered distal end portion is penetrated into a shaping flow channel beyond an orifice of the die. The molding material in molten state is introduced through the orifice into the shaping flow channel, and a solidified extrusion molding having a predetermined cross-sectional shape is exhausted out of the sizing equipment. Heat is supplied from the heat conducting member to the molding material, so that a molten portion remains when the molding material passes the distal end portion. Surface of the molding material is pressed against an inner wall face of the shaping flow channel due to a pressing force of the molten portion.

Abstract: The invention is addressed to the problem of providing a method whereby a mixing of bulk material containing fibers (fiber material) and plastic granules for the plasticate extrusion of long fiber reinforced thermoplastics (LFT) will be possible during the melting process with high production outputs and with minimized material content in the extruder system and minimized fiber damage, and to the problem of creating an apparatus with an extruder for the practice of the method, which will have an extruder housing of modified geometry as to the feed opening and the corresponding screw elements, so that the disadvantages described above are avoided.

Abstract: An extrusion system for extruding a layer of a plastic or rubber material onto a work piece without having to continuously adjust the extrusion system during the “set-up” mode to “full-run” mode, wherein the extruded layer exhibits a predetermined cross-section size and a uniform wall gauge concentricity.

Abstract: This invention relates to methods and apparatus for manufacturing shaped polymeric articles by substantially continuous vacuum forming. The method includes providing a sheet of hot polymeric material which is disposed onto a rotating belt having a mold impression. Vacuum pressure is applied to the polymeric material through the belt so as to draw the hot polymeric material into intimate contact with the mold impression to form a patterned sheet portion and a remaining sheet portion. This method thereafter cools at least the patterned sheet portion below a heat deflection temperature of the polymeric material, forms the remaining sheet portion, and then cools the remaining sheet portion below the heat deflection temperature so that features other than the central pattern, such as nail and butt edges, can be mechanically worked into the polymeric sheet.

Abstract: Film die (10) for the production of tubular film (3) made of thermoplastic synthetics with at least one feed channel for the synthetic fused material, which ends in a ring-shaped discharge nozzle and is divided into sectors (30) with an interior and/or exterior cooling ring (1) that is adjusted to the diameter of the extruded synthetic tube (3), in which physical parameters of the air blown onto the extruded film tube (3) can be variably changed sector by sector,

Abstract: An apparatus for extruding plastic, including a plastic feed, an extruder, a colored liquid additive supply, a positive displacement metering pump, and a controller. The extruder has a housing receiving plastic from the plastic feed, a heat source, and a screw adapted to drive plastic through the housing The pump supplies colored liquid additive from the supply to the plastic in the phase change section of the extruder housing. The controller controls the drive rate of the screw and the pump to supply a selected volume of colored liquid additive per unit of time which is based on the drive rate of the screw. In use, the extruder is converted to adding a different color without cleaning the housing feeding section.

Abstract: The present invention is directed to an improved apparatus for processing dough intermediates that are less developed, softer or which have enhanced water or moisture levels. More specifically, the present invention relates to the use of an improved dough transport module, that has one or more protuberances extending generally perpendicularly from a supporting surface which supports the dough intermediate for a sufficient interval of time during processing so as to eliminate the waste and loss of dough intermediates prior to processing or packaging steps.

Abstract: An external stabilizer or guide cage for plastic film extrusion has an upper frame comprised of a ring and structure for rotatably supporting the ring. A lower frame is suspended from the ring of the upper frame, and is positioned such that the lower frame surrounds the extruded tube. The lower frame can employ one or several banks of guide arms that keep the tube aligned axially as the tube is drawn upwards. The arms on the lower frame define an iris aperture, or a stack of iris apertures. The arms include channels for coolant flow. Heat transfers from the film to the guide arm. The upper frame includes a drive for rotating the ring and the lower frame of the guide cage over a predetermined arc, e.g., 60 degrees, to compensate for gauge variations in the film.

Abstract: A process for the extrusion of peroxide crosslinked polymer parts, mainly tubes, in which the crosslinkable polymer is heated in an extruder in a controlled manner to a value above the crystallite melting point of the polymer, but below the crosslinking temperature, and fed continuously to an extrusion die to create the part and in which at least a partial crosslinking of the polymer is achieved in the extrusion die by heating of the polymer above a crosslinking temperature provision.

Abstract: Continuous molding process and apparatus forms a hot melt of thermoplastic material against a mandrel disposed between revolving belt molds to make hollow product having surface patterns and textures of a variable configuration. The hot melt is delivered to the nip region of the revolving belt molds. The mandrel extends downstream of the nip region and provides resistance to the molding pressure to prevent the collapse of the hot molded product and to define the size and shape of the hollow in the formed product until it cools and sets.

Abstract: A method and apparatus for manufacturing a rubber sheet containing short fibers. The method includes the steps of: mixing short fibers in a flowable rubber matrix; forming the flowable rubber matrix with the fibers therein into a cylindrical shape with a circumferential extent; separating a portion of the circumferential extent from the cylindrical shape, and forming the cylindrical shape with the portion separated into a sheet form.

Abstract: An extrusion control system and method controls the cross section and viscosity in the process of extruding even hard to control plastics like polyurethane. Cross section, A, is determined by measuring volumetric rate of delivery of melt through a gear pump V/t and the speed of the extrudate at a puller N/t.

Abstract: A device for making a wood-like plate comprises a material receiving mold seat and a material feeding mold seat. A shaping channel is in an inner side of a material receiving mold seat. A material feeding mold seat is located in mold openings of the material receiving mold seat. A plurality of feeding openings is formed longitudinally along the material feeding mold seat for being filled with foaming material. A slit is formed as the material feeding mold seat being located in the material receiving mold seat. A wood texture layer enclosing material feeding mold seat. Heated foaming material is fed into the feeding openings of the material feeding mold seat and outputted from the feeding openings at another side so as to form a shape like the shaping channel. The wood texture layer moves forwards and then encloses the shaped foam plate so as to form a wood-like plate.

Abstract: Equipment for extruding an expanded polymer sheet or plate comprising an apparatus for the gravimetric loading (11) of a certain number of component polymers and/or mineral fillers, an extruding apparatus (17) consisting of a thermally controlled co-rotating twin-screw extruder (20) with a length ratio of at least 1/34 diameters, a loading pump (38) downstream of the extrusion apparatus, a static group (41) for the mixing and thermal conditioning of the mixture pumped, inserted in a thermo-regulated cartridge (42), a stratifier (44, 45) and a flat head (43), wherein, in at least one portion of the extrusion apparatus (17), there is an injection zone (29, 32) into which gas, such as CO2, coming from a container tank (30, 34), is introduced.

Abstract: The invention relates to a moulding system (3), in particular a calibration die (17), for an extrusion plant, with preferably parallel inlet and outlet faces (28, 29) spaced at a distance apart and with side faces (30, 31, 32, 33) extending between them. A longitudinal axis for the object to be fed through a calibration orifice (24) is disposed substantially perpendicular to the inlet and outlet face (28, 29). Provided between a shaping surface (25, 26) and a side face (30, 31, 32, 33) is a gap (37, 38) extending at least across a part of the distance between the inlet and outlet face (28, 29). The gap (37, 38) is disposed between several immediately adjacent parts of several shaping surfaces (26) of the calibration orifice (24) and at least one of the side faces (30, 31, 32, 33). At least the parts of the shaping surfaces (26) co-operating with the gap (37, 38) are displaceable relative to the other shaping surfaces (25).

Abstract: An apparatus for producing a ceramic molding having a desired shape by extruding a ceramic material includes a screw type extruder and mold connected to the distal end of the extruder through a resistance pipe. The ceramic material is pressure-fed from the extruder into the resistance pipe and is heated or cooled from round the periphery of the resistance pipe to control the shape of the ceramic molding extruded from the mold.

Abstract: A cool-dissolving apparatus for producing a solution from a mixture of polymer and solvent includes a double-structure pipe which is constructed of a cylinder and a jacket surrounding the cylinder. A mixture is fed in the cylinder, and a cooling medium flows in a space between the cylinder and the jacket oppositely to the mixture in the cylinder such that polymer dissolves to the solvent. The obtained solution is supplied in a heat-dissolving apparatus including a pipe for feeding the solution. In the heat-dissolving apparatus, the pipe extends horizontally or upwards in a feeding direction of the solution.

Abstract: The invention relates to a method for producing plastic profiles comprised of at least one hard profile strand (2), for example, consisting of hard PVC, and of at least one soft profile strand (1), for example, consisting of soft PVC, whereby both profile strands (1, 2) are simultaneously produced by separate extrusion nozzles (20, 17a) and are cooled in a cooling device (16, 18). A secure joining can be effected using simple means by leading the soft profile strand (1) directly out or the extruder (17) and into a cooling bath (16, 18), inside of which it is completely cooled, and the hard profile strand (2) and the soft profile strand (1) are subsequently joined under pressure.

Abstract: The present invention provides an apparatus and method for manufacturing polymeric thin-walled tubular members, which are well-suited for use as vascular grafts. The apparatus of the present invention enables extrusion of a tubular member having an extremely thin wall thickness so as to facilitate passage through tortuous vascular passageways. The apparatus achieves uniform wall thickness in a tubular member by establishing and maintaining axial alignment of a ram having a concentrically disposed guide rod therein with a die supported in concentric relation to the guide rod.

Abstract: The invention relates to a method and an arrangement for cooling an extruded hollow product. According to the invention, the extruder (1) is provided with means for sucking air through the pipe (2). The air to be sucked is thus in contact with the inner surface of the pipe (2), cooling the pipe from the inside. Therefore the cooling of the pipe (2) can be realized in an efficient and simple manner. By arranging the sucking to occur from the middle of the conical extruder (1), no weld line will be formed in the extruded product, and the extruder (1) can be cooled effectively from the inside. According to the invention, the heat contained by the air that has been sucked through the pipe (2) can also be utilized.

Abstract: In a conventional multilayer crosshead, only one pressure sensor is disposed in the inlet of the annular passage, preventing monitoring of membrane discontinuities; parison thickness is not constant; as the crosshead body is not cooled and parison temperature is high, a long time is required for cooling during blow molding, preventing the reduction of the molding cycle. A multilayer crosshead according to the present invention includes pressure sensors disposed in at least two positions of the annular passage so that the flow rate is controlled and monitored so as to eliminate the pressure difference between the pressure sensors, and parison temperature is lowered to a greater degree by a cooling jacket with a built-in heater disposed in the crosshead body so that a blow molding cycle is shortened.

Abstract: The invention relates to an adapter for an extruder for producing plastic profiles which is provided for the purpose of being disposed between an extrusion cylinder and an extrusion die, with the basic body of the adapter comprising a flow channel which is delimited at one outer side by a wall surface of the basic body and at one inner side by a deflection body which is rigidly connected with the basic body. A careful homogenization of the melt can be achieved in such a way that the deflection body is provided with a substantially spherical arrangement and is exclusively held by a holding pin which is situated downstream and is connected via bridges with the adapter.

Abstract: An apparatus for continuously forming thermoplastic adhesive cartridges. A molten thermoplastic adhesive supply provides a supply of molten adhesive to a pump downstream from the molten thermoplastic adhesive supply. The pump then provides a molten thermoplastic adhesive melt stream which passes through a screen filter downstream from the pump to prevent the discharge of impurities in the molten thermoplastic adhesive melt stream from the pump. A temperature-controlled conduit downstream from the pump then lowers the temperature of the molten plastic melt stream to closely above its softening point. A continuous molder located downstream from the melt pump for receives the molten plastic melt stream from the melt pump to form the thermoplastic adhesive cartridge continuously.

Abstract: An improved method and apparatus is provided for extruding ePTFE tube for use in medical applications. A tube of PTFE is extruded, preferably in an extrusion process, using counter-rotated die components. The die component is maintained at a constant temperature during processing. The resulting green tube has enhanced fibrous state formation in a direction perpendicular to the direction of extrusion. The PTFE green tube is then subjected to secondary operations such as stretching and expansion to yield medical product. The ePTFE tube structure is defined by nodes interconnected by elongate fibrils. Both the nodes and fibrils are substantially randomly tilted with respect to the longitudinal axis of the tube. This particular structure yields a tube which exhibits a high degree of radial tear strength useful in medical applications.

Abstract: The invention relates to a method for making a dimensionally stable wood-thermoplastic composite material composed of a wood component and a thermoplastic component comprising the steps of forming a wood-thermoplastic mass at a temperature above the melting temperature of the thermoplastic component. The mass is then passed through a converging die to form a shaped extrudate profile having a cross sectional shape wherein at least a part of the converging die is maintained at a substantially higher temperature than that of the mass. The profile is then fed through a low friction thermally insulating land section, the land section having the substantially the same cross sectional shape as the exit end of the converging die. The profile is then quenched in a non-oxidizing environment to form a substantially dimensionally stable outer shell around the profile, the shell having a temperature below the melting temperature of the thermoplastic component.

Abstract: An apparatus for cooling and calibrating and extruded plastic profile (2) is described, with a cooling tank (4) which receives a cooling liquid (12) and can be charged with a pressure below atmospheric, and with at least one calibrating device (5) arranged within the cooling tank (4) for the plastic profile (2) pulled through the cooling tank (4), with the calibrating device (5) being composed of individual parts extending in the direction of passage of the plastic profile (2). In order in to provide advantageous construction conditions it is proposed that the parts of the calibrating device (5) form calibrating elements (8) which are distributed over the circumference of the plastic profile (2) by leaving out gaps (15) for the passage of cooling liquid.

Abstract: The invention relates to a shaping apparatus for an extrusion system with at least one calibration die having a plurality of calibration units (31) disposed one after the other, having a calibration orifice (38) with a plurality of shaping surfaces (39 to 42) which come into contact with an article (6) fed therethrough, and end faces (43) spaced apart from one another with side faces (45 to 48) extending between them. At least one cavity is provided between at least two immediately adjacent calibration units (31). The calibration die is provided with means for dispersing heat. The calibration orifice (38) is provided with at least one continuous circulation passage (67) around a predominant part of and immediately adjacent to its circumference, having a separate inlet and outlet line (68, 69).

Abstract: Method of adjusting the lip opening of an extrusion die for stratiform material, with the characteristic that it consists in the combination of, on the one side, the control of the heating of bar shaped elements (9) which act upon at least one of the lips (6-7) of the lip opening (5), in function of the thickness of the formed material, and on the other hand, the common cooling of several bar shaped elements (9) by forcing a cooling medium along these elements (9).